{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-21795",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21795",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-02-27T02:18:31.538Z",
    "updatedAt": "2026-10-15T01:04:27.946Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "NFSD: fix hang in nfsd4_shutdown_callback",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix hang in nfsd4_shutdown_callback\n\nIf nfs4_client is in courtesy state then there is no point to send\nthe callback. This causes nfsd4_shutdown_callback to hang since\ncl_cb_inflight is not 0. This hang lasts about 15 minutes until TCP\nnotifies NFSD that the connection was dropped.\n\nThis patch modifies nfsd4_run_cb_work to skip the RPC call if\nnfs4_client is in courtesy state.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "67ef9e5fd737eab2495f2586df7e9ea30caa1b77",
              "status": "affected",
              "versionType": "git",
              "lessThan": "abed68027ea3ab893ac85cc46a00e2e64a324239"
            },
            {
              "version": "26540b8940a2e21582afa61a6fb8af87310bac72",
              "status": "affected",
              "versionType": "git",
              "lessThan": "efa8a261c575f816c7e79a87aeb3ef8a0bd6b221"
            },
            {
              "version": "66af25799940b26efd41ea6e648f75c41a48a2c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "38d345f612503b850c2973e5a879f88e441b34d7"
            },
            {
              "version": "66af25799940b26efd41ea6e648f75c41a48a2c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "23ad7797c74cd8f7f90617f1e59a8703e2b43908"
            },
            {
              "version": "66af25799940b26efd41ea6e648f75c41a48a2c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cedfbb92cf97a6bff3d25633001d9c44442ee854"
            },
            {
              "version": "66af25799940b26efd41ea6e648f75c41a48a2c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e88d2451cd42e025465d6b51fd716a47b0b3800d"
            },
            {
              "version": "66af25799940b26efd41ea6e648f75c41a48a2c2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "036ac2778f7b28885814c6fbc07e156ad1624d03"
            },
            {
              "version": "5.10.220",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.235"
            },
            {
              "version": "5.15.154",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.179"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.19",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.19"
            },
            {
              "version": "5.10.235",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.179",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.129",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.79",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.16",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "version": "6.14",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}